#version 3.7;

#include "textures.inc"

difference
{
   box{<-2,1,-2>, < 2,4, 2> }
   union
   {
      box{< 0,0,-3>, < 3,3, 3>}
      box{< 0,2,-3>, < 3,5, 3>}
   }
   texture {Gold_Texture}
}

light_source { <5,3,0> }

camera
{
  location <5,3,0>
  look_at <0,3,0>
  sky <0,1,0>
}

Rendering the above scene creates a box with some kind of hole in the middle.
The boxes in the union must be like a big box {< 0,0,-3>, < 3,5, 3>} but the
behavior is different.

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